aloisiite

noun

alo·​isi·​ite

ˌaləˈwiˌshīt,

-wis(h)ēˌīt

plural -s

: a mineral consisting of hydrous subsilicate of calcium, ferrous iron, magnesium, and sodium occurring in amorphous brown-to-violet masses

Word History

Etymology

Prince Luigi (Aloisius) Amedeo †1933 duke of the Abruzzi + English -ite

First Known Use

1909, in the meaning defined above

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

• More than 250,000 words that aren't in our free dictionary
• Expanded definitions, etymologies, and usage notes
• Advanced search features
• Ad free!